DOSSIER · 13F Holders · Q2 2026

WEIBO CORP

4 institutions still hold WEIBO CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 948596951·4 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$898K
visible holders
Holders
4
filers reporting
Concentration
35.08%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported WEIBO CORP in Q2 2026. GROUP ONE TRADING LLC leads at 35.1% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$315K43K0.00%Q2 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$311K43K0.00%Q2 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$272K37K0.00%Q2 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025